中國極端氣溫和降水趨勢變化研究.pdf

1、南京信息工程大學(xué)碩士學(xué)位論文中國極端氣溫和降水趨勢變化研究姓名：張寧申請學(xué)位級別：碩士專業(yè)：氣象學(xué)指導(dǎo)教師：孫照渤20070501AbstractBasedonthedataofdailytemperatureandprecipitationfromyear1955to2005，thespatialandtemporalfeaturesoftrendsofex：仕emeclimateeventsarestudiedandthemajor

2、conclusionsaresummarizedasfollow：1(1)Resultsshowthatthestableincreasingtrendsofannualandseasonalextremen血illluilltemperaturesarefoundalloverChinainthespacialStr)1ctRreDecreasingttendaofexlzemeⅡ擅ⅨiIr嘶temperaturesareobviou

3、sinthelowerreachesoftheYeLlowRiverinyearspringand511mmer|ontheotherside，increasingtrendsofa(tlemetemperaturesareobviousinsouthChinaandnorthwestChina(2)Generallyincreasingtrendsofextremetemperaturesinthetemporalchangeared

4、etectedandincreasemextrememinHnBrlltemperaturesismoredominantthanthatinexamemaximumtemperaturesIncreasingtrendsofexUeinetemperaturesarefoundineveryseasonespeciallyinwinterFurtheranalysissuggeststhatinterdecadalvariations

5、inextrememaximumandminirnumtemperaturesaregenerallyconsistent2(1)Therearegoodrelationsinthechangesbetweenextremetemperaturesandtheirfrcquencesinthespecial姍cture：(2)inthetemporalchange，thetrendsof矗equencesofa疏嘴memil[1imBm

6、temperatureevents，butitiscontraryinthefiequencesofextrememaximumtemperatureevents3(1)Thetrendsofintensitiesandfrequenc鵲ofextremeprecipitationeventsaledecreasedinthenorthChina、ShandongProvinceandtheGreatBendoftheHuangheRi

7、verbutobviouslyincreasedinthenorthofnorthwestChinainthespecialstructure；(2)TheresearchesabouttheextremeprecipitationeventsshowthatthelongtermchangeofannualexUemeprecipitationeventshastwodifferentperiodsinthetemporalchang